Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Subr, Ladislav"'
This study focuses on the long-term evolution of two bodies in nearby initially coplanar orbits around a central dominant body perturbed by a fourth body on a distant Keplerian orbit. Our previous works that considered this setup enforced circular or
Externí odkaz:
http://arxiv.org/abs/2405.09630
Autor:
Kroupa, Pavel, Jerabkova, Tereza, Thies, Ingo, Pflamm-Altenburg, Jan, Famaey, Benoit, Boffin, Henri M. J., Dabringhausen, Joerg, Beccari, Giacomo, Prusti, Timo, Boily, Christian, Wu, Xufen, Haas, Jaroslav, Haghi, Hosein, Zonoozi, Akram Hasani, Thomas, Guillaume, Subr, Ladislav, Aarseth, Sverre J.
After their birth a significant fraction of all stars pass through the tidal threshold (prah) of their cluster of origin into the classical tidal tails. The asymmetry between the number of stars in the leading and trailing tails tests gravitational t
Externí odkaz:
http://arxiv.org/abs/2210.13472
Autor:
Wirth, Henriette, Kroupa, Pavel, Haas, Jaroslav, Jerabkova, Tereza, Yan, Zhiqiang, Šubr, Ladislav
Recent results suggest that the initial mass function (IMF) of globular clusters (GCs) is metallicity and density dependent. Here it is studied how this variation affects the initial masses and the numbers of core collapse supernovae (CCSNe) required
Externí odkaz:
http://arxiv.org/abs/2209.00045
The most accurate current methods for determining the ages of open star clusters, stellar associations and stellar streams are based on isochrone fitting or the lithium depletion boundary. We propose another method for dating these objects based on t
Externí odkaz:
http://arxiv.org/abs/2112.03940
Autor:
Wirth, Henriette, Jerabkova, Tereza, Yan, Zhiqiang, Kroupa, Pavel, Haas, Jaroslav, Šubr, Ladislav
Many globular clusters (GCs) are known to host multiple populations distinguishable by their light-element content. Less common are GCs displaying iron abundance spreads which are seen as evidence for enrichment through core collapse supernovae (SNe)
Externí odkaz:
http://arxiv.org/abs/2107.06240
The observation of quasars at very high redshift such as Poniuaena is a challenge for models of super-massive black hole (SMBH) formation. This work presents a study of SMBH formation via known physical processes in star-burst clusters formed at the
Externí odkaz:
http://arxiv.org/abs/2007.14402
Publikováno v:
A&A 626, A79 (2019)
ALMA observations of the Serpens South star-forming region suggest that stellar protoclusters may be completely mass segregated at birth. Independent observations also suggest that embedded clusters form segregated by mass. As the primordial mass seg
Externí odkaz:
http://arxiv.org/abs/1905.09289
Autor:
Pavlík, Václav, Šubr, Ladislav
Publikováno v:
A&A 620, A70 (2018)
Core collapse is a prominent evolutionary stage of self-gravitating systems. In an idealised collisionless approximation, the region around the cluster core evolves in a self-similar way prior to the core collapse. Thus, its radial density profile ou
Externí odkaz:
http://arxiv.org/abs/1808.05230
Autor:
Subr, Ladislav, Haas, Jaroslav
Hypervelocity stars (HVSs) that are observed in the Galactic halo, are believed to be accelerated to large velocities by a process of tidal disruption of binary stars passing close to a supermassive black hole (SMBH) which resides in the center of th
Externí odkaz:
http://arxiv.org/abs/1606.09247
Autor:
Haas, Jaroslav, Subr, Ladislav
There is growing evidence of star formation in the vicinity of supermassive black holes (SMBH) in galactic nuclei. A viable scenario for this process assumes infall of a massive gas cloud towards the SMBH and subsequent formation of a dense accretion
Externí odkaz:
http://arxiv.org/abs/1602.05582